Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133559897
Author: KALPAKJIAN
Publisher: PEARSON
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Textbook Question
Chapter 33, Problem 40QTP
A surface with a triangular sawtooth roughness pattern has a peak-to-valley height of 4 μm. Find the Ra and Rq values.
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a) Define specific energy for plane strain machining (cutting).
b) In plane-strain orthogonal machining, the two main sources of energy dissipation are deformation along the shear plane (~70%) and friction at the tool-chip contact along the rake face (~30%). Consider plane-strain machining of a rigid perfectly-plastic work material whose uniaxial yield stress is 700 MPa, and is independent of strain rate and temperature. A tool of zero-degree rake angle is employed. Measurements showed the (deformed) chip thickness to be twice that of the undeformed chip thickness. Based on the aforementioned distribution of energy, estimate the specific energy for this process.
Explain how the stylus is able to detect the surface roughness profile.
A student is performing a turning operation with a workpiece with an initial diameter of 40 mm to produce a 30 mm diameter rod that is 100 mm long. The lathe power is 20 kW and is operating on 85% mechanical efficiency. If the student set the cutting speed to 0.5 m/min and the cutting tool is set to have a rake angle of 5 degrees:
a.) What material can we choose for the rod is the coefficient of friction is 0.5?
b.) If we select 4130 normalized heat-treated steel for the rod, and coefficient of friction is 0.5, what will the maximum depth of cut we can achieve?
Chapter 33 Solutions
Manufacturing Engineering & Technology
Ch. 33 - What is tribology?Ch. 33 - Explain what is meant by (a) surface texture and...Ch. 33 - List and explain the types of defects typically...Ch. 33 - Define the terms (a) roughness, and (b) waviness.Ch. 33 - Explain why the results from a profilometer are...Ch. 33 - Prob. 6RQCh. 33 - List the types of wear generally observed in...Ch. 33 - Define the terms wear, friction, and lubricant.Ch. 33 - How can adhesive wear be reduced? Abrasive wear?Ch. 33 - Prob. 10RQ
Ch. 33 - Explain the functions of a lubricant in...Ch. 33 - Prob. 12RQCh. 33 - Prob. 13RQCh. 33 - Describe the factors involved in lubricant...Ch. 33 - Prob. 15RQCh. 33 - Prob. 16QLPCh. 33 - Explain the significance of the fact that the...Ch. 33 - Prob. 18QLPCh. 33 - Explain why identical surface-roughness values do...Ch. 33 - Prob. 20QLPCh. 33 - Prob. 21QLPCh. 33 - Prob. 22QLPCh. 33 - Prob. 23QLPCh. 33 - Comment on the surface roughness of various parts...Ch. 33 - Prob. 25QLPCh. 33 - Do the same as for Problem 33.25, but for surface...Ch. 33 - Describe your observations regarding Fig. 33.7.Ch. 33 - Give the reasons that an originally round specimen...Ch. 33 - Prob. 29QLPCh. 33 - Explain the reason that the abrasive-wear...Ch. 33 - Prob. 31QLPCh. 33 - List the similarities and differences between...Ch. 33 - Explain why the types of wear shown in Fig. 33.11...Ch. 33 - List the requirements of a lubricant.Ch. 33 - List manufacturing operations in which high...Ch. 33 - List manufacturing operations in which high wear...Ch. 33 - Prob. 37QLPCh. 33 - Prob. 38QTPCh. 33 - A surface with a triangular sawtooth roughness...Ch. 33 - List the steps you would follow if you wished to...Ch. 33 - Discuss the tribological differences between...Ch. 33 - Section 33.2 listed major surface defects. How...Ch. 33 - Describe your own thoughts regarding biological...Ch. 33 - Prob. 48SDPCh. 33 - Prob. 49SDPCh. 33 - Prob. 50SDPCh. 33 - Describe your thoughts on the desirability of...
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- Reply as soon as posible, please! 1) What is the shear modulus and how can it be obtained from a torsion test? 2) Explain why it is necessary to consider geometric factors when determining distortion in torsional testing.arrow_forwardWhat force is required to punch a ½ - inch hole on a 3/8 thick plate if the ultimate shearing strength of the plate strength of the plate is 42000 psi and a factor of safety of 2?arrow_forwardEstimate the manufacturing cost for a simple machined component: a. Compare the costs for manufacturing volumes of 1, 10, 100, 1000, and 10,000 pieces with an intermediate tolerance and surface finish. Explain why there is a great change between 1 and 10 and a small change between 1000 and 10,000 pieces. b. Compare the costs for fit, intermediate, and rough tolerances with a volume of 100 pieces. c. Compare the costs of manufacturing the component out of various materials.arrow_forward
- Define the comparative surface roughness values against typical manufacturing processes.arrow_forwardbriefly explain in your own words why a small volume of sample limits the use of ring detachment method.arrow_forwardConsider your own undertaking in the light of the one that is provided as an example in the piece, and then assess whether or not the waterfall method would be suitable for tackling it.arrow_forward
- Please, reply as soon as posible, thanks! 1) Explain why it is necessary to consider geometric factors when determining distortion in torsional testing.arrow_forwardDraw the forces and angles involved in the cutting process and calculate shear angle (Ø), friction coefficient and tangential force ,cutting force = 80 kN, resultant of forces =100KN. friction force=75KN, rake angle =20' undeformed chip thickness = 0.65mm and deformed chip thickness = 0.72mm vjallarrow_forwardDetermine the direction of slip line at the workpiece tool interface in the condition of coulombfriction when the value of COF is 0.2 and the normal stress is 100 N/mm^2?. The value of theshear yield strength is 84 N/mm^2?. Also explain the direction of slip line theory with coulombfriction.arrow_forward
- 1) What is the difference between kinetic and static friction? 2) What is the effect of static coefficient between two surfaces wood and steel? discuss it carefully by step.arrow_forward2 1.4 1 The Taylor tool-life equation is directly applicable to flank wear. Explain whether or not it can be used to model tool life if other forms of wear are dominant.arrow_forwardWhich is a more precise (or exact) measuring tool, the balance or the graduated cylinder? Explain your answer.arrow_forward
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Surface Finish Measurement - Skidded VS. Skidless Surface Roughness Measurement; Author: Mitutoyo America Corporation;https://www.youtube.com/watch?v=X7jCTIwVs80;License: Standard Youtube License